Multiple Choice
During anaphase I of meiosis I, which structures are separated and pulled toward opposite poles of the cell?
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12. Meiosis
Meiosis I
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During which stage of meiosis I do homologous chromosomes separate?
A
Anaphase I
B
Metaphase I
C
Telophase I
D
Prophase I
Verified step by step guidance1
Step 1: Understand the process of meiosis I, which is the first division in meiosis. It involves the separation of homologous chromosomes to reduce the chromosome number by half.
Step 2: Recall the stages of meiosis I: Prophase I, Metaphase I, Anaphase I, and Telophase I. Each stage has specific events that occur.
Step 3: Focus on Anaphase I. During this stage, homologous chromosomes are pulled apart by spindle fibers and move toward opposite poles of the cell. This is the key event where homologous chromosomes separate.
Step 4: Compare Anaphase I with the other stages: Prophase I involves chromosome condensation and crossing over, Metaphase I involves homologous chromosomes aligning at the metaphase plate, and Telophase I involves the formation of two nuclei. None of these stages involve the physical separation of homologous chromosomes.
Step 5: Conclude that the correct stage during which homologous chromosomes separate is Anaphase I, based on the events described.
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